CN102554519A - Flux-cored wire for master cable energy forced shaping, and preparation and application method thereof - Google Patents
Flux-cored wire for master cable energy forced shaping, and preparation and application method thereof Download PDFInfo
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- CN102554519A CN102554519A CN2011104183879A CN201110418387A CN102554519A CN 102554519 A CN102554519 A CN 102554519A CN 2011104183879 A CN2011104183879 A CN 2011104183879A CN 201110418387 A CN201110418387 A CN 201110418387A CN 102554519 A CN102554519 A CN 102554519A
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Abstract
The invention relates to the field of metal welding materials, especially a high-efficiency flux-cored wire for master cable energy forced shaping, and a preparation and application method thereof. The flux-cored wire comprises an outer steel belt sheath and a filling and welding flux, wherein the filling and welding flux is prepared from the following components in percentage by mass: 0.03-0.06% of C, 0.25-0.70% of Si, 1.3-2.0% of Mn, 0.1-0.7% of Ni, 0.1-0.4% of Mo, 0.01-0.1% of Ti, 0.003-0.01% of B, 0.01-1.1% of Mg, at most 0.1% of Al, 5-10% of slag former, and the balance of Fe and inevitable impurities; and the filling and welding flux in the flux-cored wire accounts for 15-25% of the total mass of the flux-cored wire. The flux-cored wire has the advantages of strong adaptability, wide range of adoptable welding technology, adjustable composition, high melting rate, smooth welding process, less dust, favorable slag detachability, favorable flowability and fewer generated bubbles; and due to the reasonable addition of iron powder, the flux-cored wire enhances the welding deposition efficiency, ensures the low-temperature toughness of the welding seam, and obtains excellent comprehensive mechanical properties.
Description
Technical field
Field involved in the present invention is a welding material of metal, and particularly a kind of suitable large-line energy forced shaping, weld heat input are imported the efficient flux-cored wire greater than 100kJ/cm.
Background technology
Along with the construction demand of large-scale storage tank, container, ocean platform, bridge etc. improves constantly; The application of the application of big slab and large-line energy welding method (input of single track sweating heat surpasses 50kJ/cm) also enlarges gradually, some single track welding heat input even up to 500kJ/cm～600kJ/cm.With welding 20mm steel plate is example, and its heat input is about 100kJ/cm, and the heat affected area temperature range is between 1350 ℃～1450 ℃, and this moment, t8/5 can reach 161s; When thickness of slab was increased to about 55mm～65mm, input heat was 500kJ/cm～600kJ/cm, and t8/5 can reach more than the 400s.The increase of weld heat input and the prolongation of cool time cause useful alloying element scaling loss serious; At weld heat-affected zone; Especially coarse grain zone (Coarse Grain Heat Affected Zone); Usually, cause joint toughness to descend the serious threat structural safety because crisp hard second phase (M-A/M-A-C etc.) generates and embrittlement.The welding point obdurability of structure receives the influence of mother metal steel plate and welding filling material two aspects.The mother metal aspect mainly improves the performance of closely meeting the district through the metallurgical mode of oxide.Oxide metallurgy is at first proposed in nineteen ninety generation by the Japanese; It is in steelmaking process; Size, form, quantity and the distribution of control liquid steel inclusion; Make it become the heterogeneous core of inducing intracrystalline ferrite forming core, in rolling or other hot procedure, play effective inhibition grain growth, the effect of crystal grain thinning.Even without hot procedure, the oxide in a lot of austenites also can play the effect of intracrystalline ferrite forming core particle, reaches the effect of crystal grain thinning.Under annealing or other situation about cooling off fast, MnS or other precipitated phase can become the forming core particle of cementite in the steel, reduce network cementite in the steel, improve the ductility of steel.Compared with adopting TiN and TiO particle to come thinning microstructure, improve obdurability, oxide metallurgy has its clear superiority.The fusing point of at first various oxides, sulfide is than nitrogenize object height.The coarse grain zone, heat affected area belongs to mother metal, and temperature can be up to more than 1400 ℃ in the Thermal Cycle process, and most nitride fusions not only can not suppress austenite and grow up, and can discharge a large amount of free nitrogen, cause toughness to descend.And oxide such as Ti2O3 high-temperature stability are good; Have a large amount of cation vacancies in it,, therefore be easy to be attracted because Mn+3 has identical radius with Ti+3; Cause that local poor manganese district (MDZs) produces; Chemical driving force increases, and promotes the formation of acicular ferrite, thereby improves the toughness of coarse grain zone.Use oxide metallurgical technology Japan and produce the above steel plate (thickness is greater than 50mm) of YP460, through the upright upwards welding of pneumoelectric, coarse grain zone-20 ℃ ballistic work can reach more than the 100J, explains that it has good obdurability.The use of the metallurgical steel of oxide can improve the toughness of coarse grain zone greatly, guarantees the performance in joint most fragile zone, has promoted the security and the usability of structure greatly.Electro-gas (enclosed) welding is crossed forced shaping of range request single track and accomplished connection, and is therefore also higher to the requirement of welding material.Because electro-gas (enclosed) welding adopts bigger current/voltage to weld, it is big therefore to import the more common manual electric arc welding of heat, semiautomatic welding and automatic weldering etc., requires welding material not only to have resistance to elevated temperatures, and the ability that stops high temperature microstructure to be grown up also will be arranged.In the alloy designs one very part and parcel be exactly microalloying.Reasonably microalloying can make the bainite quantity that obtains in the weld seam reduce, and the acicular ferrite amount increases, thereby reduces the influence of crisp sclerous tissues, improves Weld Performance.At present the electro-gas (enclosed) welding material is mainly flux-cored wire, and its major advantage is that adaptability is strong, and adoptable welding procedure scope is wide, composition can adjust and burn-off rate fast etc.Electro-gas (enclosed) welding flux-cored wire processing performance is also bigger to the influence of welding quality, requires that welding process is steady, fume amount is less, the removability of slag and good fluidity and avoid pore generation etc., therefore slag former is also had certain requirement.Usually slag former comprises a certain amount of fluoride, has the effect of slag making, stabilising arc and reduction slag melting point, therefore can reduce and splash, and improves welding stability.Titanium dioxide that produces in the alloy reaction and silica etc. have the little characteristics of bond energy, can reduce the surface tension of slag, and the refinement molten drop makes slag be easy to discharge.A certain proportion of in addition iron powder adds the deposition efficiency that can improve flux-cored wire, promotes welding quality.
Along with the raising of domestic welding material technology and productivity, the electro-gas (enclosed) welding product mainly relied on the situation of external import to obtain alleviation in the past, but the quality of home products and processing performance also have the space that further promotes.
Summary of the invention
One of the object of the invention provides a kind of efficient flux-cored wire of suitable large-line energy forced shaping.
Further purpose of the present invention provides the preparation and the method for using of above-mentioned efficient flux-cored wire.
In order to achieve the above object, the invention provides following technical scheme:
A kind of efficient flux-cored wire of suitable large-line energy forced shaping, it comprises outsourcing steel band and filling flux two parts, it is characterized in that: the percentage of each ingredients constitute flux-cored wire gross mass of said filling flux is: C:0.03～0.06, Si:0.25～0.70; Mn:1.3～2.0, Ni:0.1～0.7, Mo:0.1～0.4; Ti:0.01～0.1, B:0.003～0.01, Mg:0.01～1.1; Al :≤0.1, slag former 5～10, all the other are Fe and unavoidable impurities; The filling flux amount accounts for 15～25% of welding wire gross mass in the flux-cored wire.
The percentage of each ingredients constitute gross mass of postwelding weld seam is: C:0.04～0.08, Si:0.25～0.60, Mn:1.0～1.6, Ni:0.1～0.7; Mo:0.1～0.4, Ti:0.01～0.06, B:0.002～0.007, Mg:0.001～0.5; Al :≤0.06, Cu :≤0.1, S :≤0.025, P :≤0.025; N :≤0.008, O :≤0.06, surplus is Fe and unavoidable impurities.
The mass percent of each ingredients constitute filling flux of said slag former is: at least a in potassium fluoride, sodium fluoride, the lithium fluoride: 1.5～8, and fluorite: 1.2～8, rutile: 1%～4%.
Said outsourcing steel band selects for use C content to be no more than 0.07% and the less flux-cored wire special steel strip of other impurity content.
The method for preparing filling flux comprises the steps:
(1) according to following mass percent, with the form of metal powder or alloy powder batching: C:0.03～0.06, Si:0.25～0.70, Mn:1.3～2.0; Ni:0.1～0.7, Mo:0.1～0.4, Ti:0.01～0.1; B:0.003～0.01, Mg:0.01～1.1, Al :≤0.1; Slag former 3.7～20, all the other are Fe and unavoidable impurities;
(2) dry each component, the bake out temperature of every kind of component is no more than 450 ℃ of temperature, is incubated 2～4 hours;
(3) every kind of component is sieved with 80 mesh sieves, and less than the 80 purposes mixing in the batch mixer of packing into, incorporation time is no less than 35 minutes.
This method further comprises following forming step: the filling flux for preparing is added in the container on the make-up machine, join then on the steel band of wanting moulding, and curl, seal with the steel band that roll will have a filling flux.
Welding method is electro-gas (enclosed) welding, and process parameters range is following:
Voltage: 33V～49V;
Electric current: 330A～600A;
Electrode extension: steel plate thickness+about 15mm;
The 100%CO2 gas shield, flow >=35L/min;
Positive water-cooled and back side ceramic substrate or front and back water-cooled.
Prepare as follows before the flux-cored wire welding:
Butt joint divided edge of steel plate angle: 35 °～0 °;
Bottom gap: 8mm～10mm; The reply groove carries out grinder buffing before the weldering, removes rusty scale
Groove type is a V-type, increases the corresponding minimizing of bevel angle with thickness.
The invention provides the efficient flux-cored wire of a kind of suitable weld heat input input greater than 100kJ/cm; To improve deposited metal low-temperature flexibility and crack ability in the electro-gas (enclosed) welding process; Be the welding of large ship, container, maritime works's product and large scale structure bridge, a kind of reliable and effective welding filling material is provided.
Beneficial effect of the present invention is: flux-cored wire adaptability of the present invention is strong, and adoptable welding procedure scope is wide, composition can adjust and burn-off rate fast; Welding process is steady, fume amount is less, the removability of slag and good fluidity, and pore produces less; Reasonably iron powder adds and has improved the welding deposition efficiency, has guaranteed the low-temperature flexibility of weld seam and has obtained excellent comprehensive mechanical properties.
Description of drawings
Fig. 1 is the weld metal SEM photo of embodiment 2, is made up of uniform acicular ferrite.
Fig. 2 is the weld seam-20 ℃ impact specimen fracture SEM photo of embodiment 2, is dimpled fracture.
The specific embodiment
According to accompanying drawing the present invention is described further below.
The efficient flux-cored wire of suitable large-line energy forced shaping of the present invention; It comprises outsourcing steel band and filling flux two parts; Said steel band is selected C content and the less flux-cored wire special steel strip (SPCC of other impurity content for use; Be Steel Plate Cold Common), component that said solder flux comprises and the shared mass percent of each component are:
C：0.03％～0.06％Wt；
Si：0.25％～0.70％Wt；
Mn：1.3％～2.0％Wt；
Ni：0.1％～0.7％Wt；
Mo：0.1％～0.4％Wt；
Ti：0.01％～0.1％Wt；
B：0.003％～0.01％Wt；
Mg：0.01％～1.1％Wt；
Al：≤0.1％Wt；
Slag former;
All the other are Fe and unavoidable impurities.
Component that comprises in the weld seam after the welding and the shared mass percent of each component are:
C：0.04％～0.08％Wt；
Si：0.25％～0.60％Wt；
Mn：1.0％～1.6％Wt；
Ni：0.1％～0.7％Wt；
Mo：0.1％～0.4％Wt；
Ti：0.01％～0.06％Wt；
B：0.002％～0.007％Wt；
Mg：0.001％～0.5％Wt；
Al：≤0.06％Wt；
Cu：≤0.1％Wt；
S：≤0.025％Wt；
P：≤0.025％Wt；
N：≤0.008％Wt；
O：≤0.06％Wt；
Surplus is Fe and unavoidable impurities.
The effect of each alloying element is following in the flux-cored wire of the present invention:
The C element is non-has a mind to add, but proper content is very significant to intensity, toughness and the percentage elongation that guarantees deposited metal.Increase the hardness and the hardenability tendency of weld seam when its content is higher easily, the infringement weld properties.C mainly comes from outsourcing steel band and various alloy powder, C:0.03%～0.06%Wt in this flux-cored wire.
Mn and Si are deoxidiers, in the melt tank reaction process, can reduce the total O content of weld seam, and crystal grain thinning improves welding seam toughness.Weld hardness raise when Mn content was excessive, microstructure coarsening, and toughness descends.When Si content was excessive, the SiO2 in the weld seam increased, and caused viscosity coefficient of dross to increase, and the deslagging difficulty influences Weld Performance.Mn in the weld seam is mainly from manganese powder or ferromanganese, and Si should select the higher alloy of quality mainly from ferrosilicon for use in order to reduce weld seam impurity as far as possible.Si:0.25%～0.7%Wt in this flux-cored wire, Mn:1.3%～2%Wt.
Ni can effectively improve the weld seam low-temperature impact toughness, and a small amount of interpolation can effectively improve welding seam toughness, and therefore its content is no more than 0.7% at the most in deposited metal, in order to avoid do not match with other element, causes intensity, hardness to raise, and toughness descends.The main source of Ni is a metal nickel powder, Ni:0.1%～0.7%Wt in this flux-cored wire.
The Mo element can promote acicular ferrite to generate, and crystal grain thinning improves intensity, improves toughness.Therefore the invigoration effect of Mo should be added in welding wire greater than Mn in right amount, in order to avoid excessive Mo causes that weld strength is too high, toughness descends.Mo is mainly derived from raw materials such as molybdenum-iron and molybdenum powder, Mo:0.1%～0.4%Wt in this flux-cored wire.
But B element refine austenite crystal grain reduces ferrite side plate, promotes acicular ferrite, therefore is added with on a small quantity to benefit to obtain the good weld seam of toughness.Can cause when deposited metal B is excessive that impact flexibility descends.B is from ferro-boron and diboron trioxide, B:0.003%～0.01%Wt in this flux-cored wire.
Ti also belongs to effective deoxidant element, can reduce the O content in the weld seam, and forms oxide, the nitride of Ti, and forms complex inclusion with some sulfide such as MnS etc., promotes acicular ferrite to form, and improves weld seam impact toughness thus.The oxide of Ti contains a large amount of cation vacancies, can effectively attract the Mn+3 identical with the Ti+3 atomic radius, causes the generation in local poor manganese district, increases chemical driving force, promotes the formation of acicular ferrite.Ti can also stop the formation of BN.Ti comes from alloys such as ferrotianium, Ti:0.01%～0.1%Wt in this flux-cored wire.
Mg is a deoxidier, can reduce O content, and forms the Mg-O-Ti oxide, and thinning microstructure crystal grain helps to improve welding seam toughness.Micro Mg can obviously improve toughness, can cause when excessive that crystal grain is thick, and the time causes technological problems such as electric arc shakiness in welding.Mg comes from various magnesium alloys and magnesium powder etc.Mg:0.01%～1.1%Wt in this flux-cored wire.
The effect of Al is comparatively complicated, and an amount of interpolation can be played the effect of deoxidation, and improves the slag setting temperature, improves the removability of slag.But produce numerous Al 2O3 when excessive,, also be difficult for floating in the slag, therefore cause weld seam slag inclusion and weld metal embrittlement because it is insoluble to liquid metal.Therefore to control its content, avoid the generation of weld defect.Al is mainly from aluminium alloy, Al in this flux-cored wire :≤0.1%Wt.
Flux-cored wire solder flux surplus is Fe, and inevitable metal impurities and nonmetallic inclusions such as S, P such as Cu, V, Cr, Nd, and its influence can not be ignored, and therefore answers strictness to limit its content, in order to avoid the infringement joint performance.Cu in this flux-cored wire :≤0.1%Wt, S :≤0.025%Wt, P :≤0.025%Wt.In addition, N is a key factor of infringement toughness, therefore wants the N content in the strict control weld seam.N can avoid the intrusion of N through the adjustment shield gas flow rate mainly from air.Can remove surplus N through Alloying Design in addition.Guarantee N :≤0.008%Wt in this flux-cored wire.Have facilitation because the oxide of microalloy element such as Ti generates acicular ferrite, so the large-line energy welding to guarantee certain oxygen content with material, be no more than O :≤0.06%Wt usually.
Component that said slag former comprises and the shared mass percent of each component are:
Potassium fluoride/sodium/lithium: 1.5%～8%Wt;
Fluorite: 1.2%～8%Wt;
Rutile accounts for: 1%～4%Wt.
Wherein, the fluoride in the slag former (one or more in potassium fluoride/sodium/lithium, the fluorite) in welding process, have reduce splash, stabilising arc, reduction slag melting point and the effect that improves welding stability.Fluoride is not enough to form slag very little, and the quantity of slag increases too much the time, causes welding slag to discharge difficulty, and electric arc poor continuity, mother metal dilution rate diminish, and intensity, intensity rise, and percentage elongation descends, and toughness worsens, and causes weld defect easily.Therefore the adding of rutile can reduce the surface tension of slag, and effective refinement molten drop is discharged from slag more easily.
The preparation method of solder flux is as follows among the present invention:
(1) prepares each component by the mass percent of setting;
(2) dry each component, the bake out temperature of every kind of component is no more than 450 ℃ of temperature, is incubated 2～4 hours;
(3) every kind of component 100% is crossed 80 mesh sieves, after with evenly mixing in its batch mixer of packing into, incorporation time is no less than 35 minutes.
The filling flux for preparing coats the outsourcing steel band at dry, sealing state immediately, and carries out seal operation in the handling process, in order to avoid make moist.
This method further comprises following forming step: the filling flux for preparing is added in the container on the make-up machine, join then on the steel band of wanting moulding, and curl, seal with the steel band that roll will have a filling flux.
When welding, electro-gas (enclosed) welding flux-cored wire according to the invention selects: voltage: 33V～49V, electric current: 330A～600A, electrode extension: steel plate thickness+15mm; The 100%CO2 gas shield; Flow >=35L/min, positive water-cooled and back side ceramic substrate, or the equal water-cooled of front and back.
Prepare to comprise before the welding of flux-cored wire described in the present invention: butt joint divided edge of steel plate angle: 35 °～0 °, the first-selected V-type of groove type, and, increase the corresponding minimizing of bevel angle, bottom gap: 8mm～10mm with thickness in order to guarantee the deposition efficiency of slab.The reply groove carries out grinder buffing before the weldering, removes rusty scale, to guarantee fusion quality.
Embodiment 1
Contain based on the flux-cored wire gross mass in this case study on implementation: C:0.03%～0.04%Wt, Si:0.3%～0.45%Wt, Mn:1.3%～1.6%Wt; Ni:0.2%～0.5%Wt; Mo:0.2%～0.3%Wt, Ti:0.05%～0.07%Wt, B:0.003%～0.009%Wt; Mg:0.01%～1.0%Wt, Al :≤0.1%Wt; Surplus is Fe outside the above-mentioned content, and inevitable metal impurities and nonmetallic inclusions such as S, P such as Cu, V, Cr, Nd; Steel band selects for use C content to be no more than 0.07% and the less flux-cored wire special steel strip (SPCC) of other impurity content.Slag former based on the content of flux-cored wire gross mass is: potassium fluoride/sodium/lithium: 1.5%～4%Wt, and fluorite: 1.2%～4%Wt, rutile accounts for: 1%～3.5%Wt.The solder flux amount accounts for 15% of welding wire gross mass in the flux-cored wire.
Embodiment 2
Contain based on the flux-cored wire gross mass in this case study on implementation: C:0.035%～0.045%Wt, Si:0.35%～0.5%Wt, Mn:1.35%～1.65%Wt; Ni:0.2%～0.45%Wt; Mo:0.2%～0.25%Wt, Ti:0.05%～0.065%Wt, B:0.003%～0.008%Wt; Mg:0.01%～0.8%Wt, Al :≤0.1%Wt; Surplus is Fe outside the above-mentioned content, and inevitable metal impurities and nonmetallic inclusions such as S, P such as Cu, V, Cr, Nd; Steel band selects for use C content to be no more than 0.07% and the less flux-cored wire special steel strip (SPCC) of other impurity content.Slag former based on the content of flux-cored wire gross mass is: potassium fluoride/sodium/lithium: 1.5%～3.5%Wt, and fluorite: 1.2%～6%Wt, rutile accounts for: 1.5%～3%Wt.The solder flux amount accounts for 21% of welding wire gross mass in the flux-cored wire.Accompanying drawing 1 is the weld metal SEM photo of embodiment 2, is made up of uniform acicular ferrite; Accompanying drawing 2 is the weld seam-20 ℃ impact specimen fracture SEM photo of embodiment 2, is dimpled fracture.
Embodiment 3
Contain based on the flux-cored wire gross mass in this case study on implementation: C:0.045%～0.055%Wt, Si:0.45%～0.6%Wt, Mn:1.55%～1.8%Wt; Ni:0.2%～0.35%Wt; Mo:0.2%～0.25%Wt, Ti:0.05%～0.075%Wt, B:0.0045%～0.009%Wt; Mg:0.03%～0.85%Wt, Al :≤0.1%Wt; Surplus is Fe outside the above-mentioned content, and inevitable metal impurities and nonmetallic inclusions such as S, P such as Cu, V, Cr, Nd; Steel band selects for use C content to be no more than 0.07% and the less flux-cored wire special steel strip (SPCC) of other impurity content.Content based on the flux-cored wire gross mass in the slag former is: potassium fluoride/sodium/lithium: 3.5%～7%Wt, and fluorite: 3.2%～6.5%Wt, rutile accounts for: 3%～4%Wt.The solder flux amount accounts for 25% of welding wire gross mass in the flux-cored wire.
The source of above-mentioned element should select impurity content little as far as possible, and the material that constituent content is higher to reduce total impurity content, guarantees the degree of purity of weld seam, reduces the generation of weld defect.The production technology aspect should strictly observe production technology, and solder flux must fully mix, to guarantee powder feeding validity.
Claims (9)
1. the efficient flux-cored wire of a suitable large-line energy forced shaping, it comprises outsourcing steel band and filling flux two parts, it is characterized in that: the percentage of each ingredients constitute flux-cored wire gross mass of said filling flux is: C:0.03～0.06, Si:0.25～0.70; Mn:1.3～2.0, Ni:0.1～0.7, Mo:0.1～0.4; Ti:0.01～0.1, B:0.003～0.01, Mg:0.01～1.1; Al :≤0.1, slag former 5～10, all the other are Fe and unavoidable impurities; The filling flux amount accounts for 15～25% of welding wire gross mass in the flux-cored wire.
2. flux-cored wire as claimed in claim 1 is characterized in that: the percentage of each ingredients constitute gross mass of postwelding weld seam is: C:0.04～0.08, Si:0.25～0.60, Mn:1.0～1.6; Ni:0.1～0.7, Mo:0.1～0.4, Ti:0.01～0.06, B:0.002～0.007; Mg:0.001～0.5, Al :≤0.06, Cu :≤0.1, S :≤0.025; P :≤0.025, N :≤0.008, O :≤0.06, surplus is Fe and unavoidable impurities.
3. flux-cored wire as claimed in claim 1 is characterized in that: the mass percent of each ingredients constitute filling flux of said slag former is: at least a in potassium fluoride, sodium fluoride, the lithium fluoride: 1.5～8, and fluorite: 1.2～8, rutile: 1%～4%.
4. flux-cored wire as claimed in claim 1 is characterized in that: said outsourcing steel band selects for use C content to be no more than 0.07% and the less flux-cored wire special steel strip of other impurity content.
5. the preparation method of a flux-cored wire as claimed in claim 1, it is characterized in that: the method for preparing filling flux comprises the steps:
(1) according to following mass percent, with the form of metal powder or alloy powder batching: C:0.03～0.06, Si:0.25～0.70, Mn:1.3～2.0; Ni:0.1～0.7, Mo:0.1～0.4, Ti:0.01～0.1; B:0.003～0.01, Mg:0.01～1.1, Al :≤0.1; Slag former 3.7～20, all the other are Fe and unavoidable impurities;
(2) dry each component, the bake out temperature of every kind of component is no more than 450 ℃ of temperature, is incubated 2～4 hours;
(3) every kind of component is sieved with 80 mesh sieves, and less than the 80 purposes mixing in the batch mixer of packing into, incorporation time is no less than 35 minutes.
6. the preparation method of flux-cored wire as claimed in claim 5; It is characterized in that: this method further comprises following forming step: the filling flux for preparing is added in the container on the make-up machine; Join then on the steel band of wanting moulding, and curl, seal with the steel band that roll will have a filling flux.
7. the method for using of a flux-cored wire as claimed in claim 1, it is characterized in that: welding method is electro-gas (enclosed) welding, and process parameters range is following:
Voltage: 33V～49V;
Electric current: 330A～600A;
Electrode extension: steel plate thickness+about 15mm;
The 100%CO2 gas shield, flow >=35L/min;
Positive water-cooled and back side ceramic substrate or front and back water-cooled.
8. the method for using of flux-cored wire as claimed in claim 7 is characterized in that: prepare as follows before the flux-cored wire welding:
Butt joint divided edge of steel plate angle: 35 °～0 °;
Bottom gap: 8mm～10mm; The reply groove carries out grinder buffing before the weldering, removes rusty scale.
9. the method for using of flux-cored wire as claimed in claim 8, it is characterized in that: groove type is a V-type, increases the corresponding minimizing of bevel angle with thickness.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418923A (en) * | 2013-08-30 | 2013-12-04 | 北京工业大学 | Overlaying repair method for worn roller |
| CN104718048A (en) * | 2012-10-09 | 2015-06-17 | 依赛彼集团公司 | Low-manganese gas-shielded flux cored welding electrodes |
| CN106096977A (en) * | 2016-06-03 | 2016-11-09 | 武汉铁锚焊接材料股份有限公司 | A kind of flux-cored wire manufacturing parameter retroactive method based on Quick Response Code and system |
| CN107309527A (en) * | 2017-06-30 | 2017-11-03 | 蓬莱巨涛海洋工程重工有限公司 | The Large Heat Input Welding technique of marine engineering large thick steel plate under a kind of low temperature |
| CN109175781A (en) * | 2018-10-23 | 2019-01-11 | 郑州大学 | A kind of ship and the mating flux-cored wire of Marine Engineering Steel EH500 |
| CN110508969A (en) * | 2019-09-05 | 2019-11-29 | 昆山京群焊材科技有限公司 | A kind of alkalescent full-position CO2Gas protects flux-cored wire |
| CN111055042A (en) * | 2019-11-30 | 2020-04-24 | 江苏省沙钢钢铁研究院有限公司 | High heat input welded joint with excellent fatigue performance |
| US10668572B2 (en) | 2016-11-16 | 2020-06-02 | Lincoln Global, Inc. | Welding electrode wires having alkaline earth metals |
| CN111761175A (en) * | 2020-06-19 | 2020-10-13 | 武汉钢铁有限公司 | Efficient gas-slag combined shielded welding method for thick plates |
| CN112935626A (en) * | 2021-02-07 | 2021-06-11 | 天津市金桥焊材集团股份有限公司 | Metal powder cored flux-cored wire for welding fire-resistant weathering steel |
| CN113001058A (en) * | 2021-03-05 | 2021-06-22 | 李素坤 | Flux-cored wire matched with steel for high heat input welding and application thereof |
| US11247291B2 (en) | 2016-11-16 | 2022-02-15 | Lincoln Global, Inc. | Welding electrode wires having alkaline earth metals |
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| CN101396777A (en) * | 2007-09-28 | 2009-04-01 | 杰富意钢铁株式会社 | Flux-cored wire for electrogas arc welding |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104718048A (en) * | 2012-10-09 | 2015-06-17 | 依赛彼集团公司 | Low-manganese gas-shielded flux cored welding electrodes |
| CN103418923B (en) * | 2013-08-30 | 2015-06-17 | 北京工业大学 | Overlaying repair method for worn roller |
| CN103418923A (en) * | 2013-08-30 | 2013-12-04 | 北京工业大学 | Overlaying repair method for worn roller |
| CN106096977A (en) * | 2016-06-03 | 2016-11-09 | 武汉铁锚焊接材料股份有限公司 | A kind of flux-cored wire manufacturing parameter retroactive method based on Quick Response Code and system |
| US10668572B2 (en) | 2016-11-16 | 2020-06-02 | Lincoln Global, Inc. | Welding electrode wires having alkaline earth metals |
| US11247291B2 (en) | 2016-11-16 | 2022-02-15 | Lincoln Global, Inc. | Welding electrode wires having alkaline earth metals |
| CN107309527A (en) * | 2017-06-30 | 2017-11-03 | 蓬莱巨涛海洋工程重工有限公司 | The Large Heat Input Welding technique of marine engineering large thick steel plate under a kind of low temperature |
| CN109175781A (en) * | 2018-10-23 | 2019-01-11 | 郑州大学 | A kind of ship and the mating flux-cored wire of Marine Engineering Steel EH500 |
| CN110508969A (en) * | 2019-09-05 | 2019-11-29 | 昆山京群焊材科技有限公司 | A kind of alkalescent full-position CO2Gas protects flux-cored wire |
| CN111055042A (en) * | 2019-11-30 | 2020-04-24 | 江苏省沙钢钢铁研究院有限公司 | High heat input welded joint with excellent fatigue performance |
| CN111761175A (en) * | 2020-06-19 | 2020-10-13 | 武汉钢铁有限公司 | Efficient gas-slag combined shielded welding method for thick plates |
| CN112935626A (en) * | 2021-02-07 | 2021-06-11 | 天津市金桥焊材集团股份有限公司 | Metal powder cored flux-cored wire for welding fire-resistant weathering steel |
| CN113001058A (en) * | 2021-03-05 | 2021-06-22 | 李素坤 | Flux-cored wire matched with steel for high heat input welding and application thereof |
| CN113001058B (en) * | 2021-03-05 | 2022-09-20 | 李素坤 | Flux-cored wire matched with steel for high heat input welding and application thereof |
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Application publication date: 20120711 |